Inveni fateor in rege monachum, claustrum in curia, in palatio monasterii disciplinam. I confess that I found in the king a monk, in the court a cloister, and in the palace the discipline of a monastery.

-St Aelred of Riveaulx   d.1167
?c.1160  Lament for David I, King of Scotland. Quoted in  John Fordoun Chronicle of Scotland (c.1384), bk.5, ch.43.

Certainly wife and children are a kind of discipline of humanity; and single men, though they be many times more charitable, because their means are less exhaust, yet†they are more cruel and hardhearted (good to make severe inquisitors), becausetheir tenderness isnot so oft called upon.

-Bacon, Francis,Viscount St Albans
  Essays, no.8,'Of Marriage and the Single Life'.

In a world where it is so easy to neglect, deny, pervert and suppress the truth, the scientist may find his discipline severe. For him, truth is so seldom the sudden lightthat showsneworderand beauty; more often, truth is the uncharted rock that sinks his ship in the dark.

-Cornforth, SirJohnWarcup
  Nobel prize speech.

Nature's stern discipline enjoins mutual help at least as often as warfare. The fittest mayalso be the gentlest.

-Dobzhansky,Theodosius G
  Mankind Evolving.

It would be a curious reading of the history of thought to suggest that the absence of disagreement testifies to a developing discipline.

-Merton, Robert King
  Defending internal disputes among sociologists.'Now the Case for Sociology', in the NewYork Times Magazine,16  Jul.

Life has no other discipline to impose, if we would but realize it, than to accept life unquestioningly† Every moment is a golden one for him who has the vision to recognize it as such.

-Miller, Henry Valentine
  The World of Sex.

Let usnever toleratetheslightest inroad onthe discipline of our holy Church. Let us never consent that she should be made the hireling of the Ministry. Our forefathers would have diedönay, perished in hopeless slaveryörather than consent to such degradation.

-O'Connell, Daniel known as  the Liberator
  Speech, Dublin, 23 Feb.

Reasonable orders are easy enough to obey; it is capricious, bureaucratic or plain idiotic demands that form the habit of discipline.

-Tuchman, BarbaraW(ertheim)
  Stilwell and theAmerican Experience in China, pt.1, ch.1.